In C++, atof () function is used to convert ________.

• A) Character string to long integer
• B) Character string to float
• C) Character string to short
• D) Character string to integer

Which of the following is not a file opening mode?

• A) ios::ate
• B) ios::nocreate
• C) ios::in
• D) ios::trunc

To create an output file stream, we must declare the stream to be of class.

• A) ifstream
• B) ofstream
• C) iostream
• D) cstream

What will be the output of the following code? #include <iostream> #include <cstring> using namespace std; int main() { char s1[20] = "Hello"; char s2[] = "World"; strcpy(s1, s2); cout << s1; return 0; }

• A) World
• B) Hello
• C) HelloWorld
• D) Undefined

Suppose we have declared a two-dimensional array “multi”. To access its elements using pointer, we should use referencing like ________.

• A) **multi
• B) *multi
• C) *multi + 1
• D) multi

What will happen if you run the following code when "data.txt" does not exist? #include <iostream> #include <fstream> using namespace std; int main() { ifstream file("data.txt"); if (!file) { cout << "File not found!" << endl; } return 0; }

• A) It will throw an exception.
• B) It will print File not found!.
• C) It will do nothing.
• D) It will create "data.txt".

In C++, atoi () function is used to convert _______.

• A) Character string to long integer
• B) Character string to integer
• C) Character string to double
• D) Character string to float

To perform I/O operations on file, we must use _____________ header file.

• A) cstream
• B) fstream
• C) hstream
• D) istream

In C++, a file can be opened for reading by using the _____ function.

• A) read()
• B) open()
• C) open_file()
• D) write()

What will be the output of the following code? int main (int argc, char **argv) { cout<<argc; }

• A) 2
• B) Null
• C) 0
• D) 1

In C++, a sequence of objects having the same type, is called ________.

• A) Operator
• B) Array
• C) Function
• D) Stack

What will be the output of the following code? int main() { int a[4]={1,2,3,4}; cout<< a[2]; }

• A) 1
• B) 2
• C) 3
• D) 4

What is the output of the following code snippet? int a = 5; int *ptr = &a; *ptr = 10; cout << a;

• A) 5
• B) 0
• C) 10
• D) Undefined

In C++, to get the value stored at a memory address, we use the _______ operator.

• A) dereferencing
• B) bitwise
• C) arithmetic
• D) logical

What will be the output of the following code? int main() { int x = 5; int * ptr = &x; *ptr + 1; cout << (*ptr)++; }

• A) 8
• B) 7
• C) 6
• D) 5

Identify the invalid option.

• A) int *pi = 0;
• B) int i; double* dp = &i;
• C) int *ip;
• D) char s, *sp = 0;

Which of the following option gives the [value] stored at the address pointed to by the pointer "ptr"?

• A) Value(ptr)
• B) ptr
• C) *ptr
• D) &ptr

What will be the output of the following code? int main(){ char str[] = "Hello World"; cout<<str[4]; return 0; }

• A) H
• B) l
• C) W
• D) o

In C++, a one-dimensional array inside a one-dimensional array is called _________.

• A) Three-dimensional array
• B) Multi-casting array
• C) Two-dimensional array
• D) One-dimensional array

In C++, pointer can be initialized with

• A) Hash(#)
• B) Semicolon(;)
• C) Dot(.)
• D) Null